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1.故障现象1台使用3了个月的ZL50C型装载机,在毫无前兆的情况下,其双变滤油器上的内六角螺栓突然断裂。该装载机双变滤油器主要由滤芯和壳体组成,其中壳体包括上盖和筒体,均为铸铝材质。上盖和筒体通过4个8.8级内六角螺栓组装在一起,如图1所示。维修人员反映,该型装载机在恶劣工况作业时,出现过多起双变滤油器内六角螺栓断裂现象,造成上盖与筒体分离、变矩器油外溢,导致装载机无法继续使用。
1. Symptom A 3-month-old ZL50C loader suddenly ruptured its hexagon socket head cap bolts on double-change filters without any warning signs. The dual variable filter of the loader mainly consists of a filter element and a shell, wherein the shell comprises an upper cover and a barrel body, all of which are made of cast aluminum. The upper cover and barrel are assembled together by four 8.8-level socket head cap screws, as shown in Figure 1. Maintenance personnel said that this type of loader in the harsh working conditions, there have been too many double-change filter hex bolts broken phenomenon, resulting in cover and cylinder separation, torque converter oil spill, leading to the loader can not continue to use .